During the last few days activity has continued at El Hierro even though earthquake activity has decreased a lot. Harmonic tremor is though still increasing and GPS uplift is rather dramatic with maximum values at 75mm. With a bit of internet-spelunking I have tracked down where the maximum activity is, an indicator of where a…
In this post I will elaborate on how to understand the Icelandic borehole strain and seismicity graphs. For the experts I might just be stating the obvious, but for the more general public (like myself) this might be a guide on how to understand all these enigmatic waves and ripples. This map shows the locations…
Earthquakes are a release of energy due to rock failing from the amount of stress and strain that are placed on it. This energy is released as a series of waves, or vibratory motion as the energy dissipates away from the source of the quake. Simplifying it a bit, there are S-waves, P-waves, Love Waves,…
Today we have seen a change in the behaviour at Pevolca, now they have changed the level of alarm from green all over the island, to yellow for Julan and La Dehesa. They are also asking everyone on the island to familiarise themselves with the plans for evacuation and self protection. The center for the…
Part 1, public awareness background The current hysteria over Katla started at the same time as the ash from the Eyjafjallajökull played havoc with European air travel. Some journalist noted that Iceland’s, at least publicly, most respected volcanologist Professor Páll Einarsson, the man who nailed down the February 2000 Hekla eruption to within 30 minutes,…
VolcanoCafé 
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